JP2908517B2 - Iris-colored laminate and gold-silver thread - Google Patents

Description

The present invention relates to an iris laminate and a gold-silver thread.

[Problems to be Solved by the Related Art] Hitherto, an iris-colored gold-silver thread obtained by slitting an iris-color laminate formed by providing an iris compound thin film layer such as zinc sulfide on a polyester film or the like has been known. .

However, such conventional iris-colored gold-silver yarns exhibit a monotonous iris color and are inferior in luster, and are inferior in practical characteristics as gold-silver yarns (resistance to processing such as bleaching, dyeing, scouring, or washing resistance). There was such a problem.

In view of the foregoing, the present invention provides an iris-colored laminate having excellent iris color rich in color and excellent in gloss and excellent in practical characteristics, and more particularly, an iris-colored gold-silver thread.

[Means for Solving the Problems] The present invention provides a transparent plastic film on one side, a kind of iris compound thin film layer selected from the group consisting of zinc sulfide, bismuth oxide, and antimony oxide, and a thin and thick layer. However, a transparent iris layer formed by laminating a transparent resin layer having an uneven thickness with a difference of 0.1 to 1 μm is provided, wherein the iris layer is formed on the plastic film. And a transparent resin undercoat layer having a thickness of 0.2 to 3 μm and a transparent inorganic protective layer having a thickness of 25 to 50 nm.

Further, the present invention relates to an iris-colored gold-silver thread obtained by slitting the iris-colored laminate.

[Operation and Examples] The iris laminate of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic partial sectional view showing an embodiment of the iris-colored laminate of the present invention. In FIG. 1, (1) is a transparent plastic film, on one side of which a transparent resin undercoat layer (2) and a transparent inorganic protective layer (3) are provided in this order, and on which an iris layer (4) is provided. Is provided. The iris layer (4) of this embodiment is obtained by laminating a transparent resin layer (4b) having an uneven thickness on the iris compound thin film layer (4a).

FIG. 2 is a schematic partial sectional view showing an embodiment of an iris-colored laminate according to the present invention. Also in the iris laminate shown in FIG. 2, a transparent resin undercoat layer (2) and a transparent inorganic protective layer (3) are provided in this order on one side of the plastic film (1), and the iris layer (4) is further provided thereon. ), The iris layer (4) of this embodiment is formed by laminating an iris compound thin film layer (4a) on a transparent resin layer (4b) having an uneven thickness. A transparent resin overcoat layer (5) is provided on the thin film layer (4a).

As shown in FIG. 1, when the lamination order of the iris layer (4) is from the plastic film (1) side to the iris compound thin film layer (4a) and the resin layer (4b) having an uneven thickness, the resin Since the layer (4b) is the uppermost layer, it is not particularly necessary to provide the resin overcoat layer (5).

As shown in FIG. 2, when the lamination order of the iris layer (4) is from the plastic film (1) side to the resin layer (4b) having an uneven thickness and the iris compound thin film layer (4a),
Since the iris compound thin film layer (4a) is the uppermost layer, a resin overcoating layer (5) is provided for protection when the thin film layer (4a) is used for applications requiring protection, for example, gold and silver yarn applications.

In the iris laminate of the present invention, iris is obtained on either the side of the plastic film (1) or the opposite side.

In the present invention, since the iris layer (4) has a configuration in which the iris compound thin film layer (4a) and the transparent resin layer (4b) having an uneven thickness are laminated, the iris color is rich in color and gloss. Is also excellent.

Also, by providing the iris layer (4) on the plastic film (1) via the resin undercoat layer (2) and the inorganic protective layer (3), the iris layer (4) and the plastic film (1) can be interposed. The adhesiveness is improved, so that resistance to processing such as bleaching, dyeing, scouring, or washing resistance is extremely good, and deterioration or disappearance of iris color due to such processing is prevented. This effect is particularly remarkable in the case where the iris compound thin film layer (4a) is directly laminated on the inorganic protective layer (3) as shown in FIG.

Further, since the inorganic protective layer (3) has a higher refractive index than the resin layer, the inorganic protective layer (3) has the effect of increasing the color of the iris layer (4), making it more powerful, and improving the gloss. The conventionally known iris laminate obtained by laminating a top coat resin layer on a thin film layer of zinc sulfide or the like has a defect that gloss and color developability vary greatly depending on the thickness of the thin film layer. By laminating the protective layer (3), a high refractive index can be obtained irrespective of the thickness of the iris compound thin film layer, so that it also has the effect of improving the gloss and the coloring.

The transparent plastic film (1) used in the present invention is not particularly limited, and films conventionally used for applications such as gold and silver yarns, for example, polyester, polyamide, polyamideimide, polyethylene, polypropylene, cellulose acetate, polycarbonate, polychloride Resin films such as vinyl and fluororesin are appropriately used. The thickness of transparent plastic film is usually 4-100
It is appropriately selected from the range of μm, more preferably from the range of 6 to 50 μm. In the case of the use of gold and silver yarns, the mechanical properties of the transparent plastic film almost directly affect the mechanical properties of the gold and silver threads to determine the weaving property and the texture.

In the present invention, the thickness of the transparent resin undercoat layer (2) is
It is selected from the range of 0.02 to 3 μm. If the thickness of the transparent resin undercoat layer is less than 0.02 μm, the resistance to washing, bleaching, dyeing, scouring, etc. is poor, which is not preferable. On the other hand, if the thickness exceeds 3 μm, it becomes undesirably rigid as a whole in applications such as gold and silver yarns and lacks in weaving properties and texture.

As the resin for forming the transparent resin undercoat layer (2), any of various resins such as a thermoplastic resin, a thermosetting resin, an electron beam curable resin, and an ultraviolet curable resin can be used. For example, an acrylic resin , Styrene resin, acrylic-styrene copolymer, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, A melamine-based resin, a urea-melamine-based resin, an epoxy-based resin, an alkyd-based resin, an aminoalkyd-based resin, a rosin-modified maleic resin, or a mixture thereof is preferably used. Particularly, a curable resin is preferable.

The transparent resin undercoat layer (2) is formed by, for example, a gravure coating method using an organic solvent solution or an aqueous solution of the resin,
The coating is performed by applying a uniform thickness by a normal coating method such as a spray coating method and drying (curing in the case of a thermosetting resin, an electron beam curable resin, an ultraviolet curable resin, or the like).

The inorganic protective layer (3) in the present invention is a resin undercoat layer (2)
A transparent thin film layer of an inorganic substance which can improve the adhesion between the iris layer and the iris layer (4), for example, silicon, silicon oxide,
_{[SiO, SiO 2, SiOx (x} = 0.3~2, inter alia, 0.7 to 1.
8)], aluminum oxide [Al ₂ O ₃ , Al ₂ Ox (x = 1 to
3)] is suitable. As described above, the thin film layer of these inorganic substances also has the effect of enriching the color of the iris layer (4) and further improving the gloss. Further, since the silicon oxide thin film layer itself exhibits an iris color, the obtained laminate has a better iris color.

The inorganic protective layer (3) has a uniform thickness in the range of 25 to 50 nm. If the thickness of the protective layer (3) is less than 25 nm, the effect of preventing the iris from deteriorating for various treatments is not sufficient, while if it exceeds 50 nm, the transparency is reduced or cracks are easily formed, and the resistance to various treatments is increased. It is not preferable because the property is lowered.

The inorganic protective layer (3) may be formed by using a corresponding evaporation source material by a thin film forming method of a normal evaporation method such as a resistance heating method, a high-frequency induction heating method, and an electron beam heating method. As the evaporation source material, Si is used for the silicon protective layer, and SiO is used for the silicon oxide protective layer.
A material obtained by press molding of SiO ₂ , a mixture of these materials, and a mixture of Si and SiO ₂ , and in the case of an aluminum oxide protective layer, a material obtained by press molding of Al ₂ O ₃ are used as appropriate.

The film thickness of the inorganic protective layer (3) is a value measured by a crystal oscillator film thickness monitor.

Examples of the iris compound thin film layer (4a) in the present invention include zinc sulfide, bismuth oxide, and antimony oxide thin film layers. Zinc sulfide, bismuth oxide [BiO, Bi ₃ O ₃ , Bi ₂ O ₄ , Bi ₂ O ₅ , Bi ₂ Ox (x = _{2) because the} iris color is beautiful and the resistance to the various treatments is excellent. Two
5)] and antimony oxide [Sb ₂ O ₃ , Sb ₂ O ₄ , Sb ₂ O ₅ , S
b ₂ Ox (x = 2 to 5)].

The iris compound thin film layer (4a) has a uniform thickness usually in the range of 5 to 100 nm, more preferably in the range of 20 to 80 nm. If the thickness of the thin film layer is less than 5 nm, iris gloss cannot be obtained, which is not preferable. On the other hand, if it exceeds 100 nm, the iris gloss is rather poor,
Moreover, it is not preferable because cracks are easily formed and resistance to treatment such as scouring is reduced.

The iris compound thin film layer (4a) may be formed by a normal thin film forming method such as a resistance heating method, a high-frequency induction heating method or an electron beam heating method using the evaporation source material in charge.

The evaporation source material for forming the iris compound thin film layer (4a) is not particularly limited. For example, as an evaporation source material for forming a zinc sulfide thin film layer, zinc sulfide, a powder having a purity of (ZnS) of 70% by weight or more can be appropriately used as long as it is press-formed. Press molded powder is more preferably used. As an evaporation source material for forming a bismuth oxide thin film layer, any material can be used as appropriate as long as the powder having a purity of bismuth oxide of 80% by weight or more is press-molded. Are more preferably used. As the evaporation source material for forming the antimony oxide thin film layer, any material may be used as long as it is formed by pressing a powder having a purity of at least 80% by weight of antimony oxide. Is more preferably used.

The film thickness of the iris compound thin film layer is a value measured by a crystal oscillator film thickness monitor.

Resin layer (4b) with non-uniform thickness is usually 0.01-5μ
m, more preferably in the range of 0.02 to 3 μm. If the thickness of the resin layer is less than 0.01 μm, almost no iris gloss can be obtained, which is not preferable. 5 μm
On the other hand, when it exceeds, the iris gloss is inferior, and in the case of applications such as gold and silver yarns, it is undesirably rigid as a whole and lacks in weaving properties and texture. Resin layer (4b)
Is preferably about 0.1 to 1 μm (the difference between the thick and thin portions of the resin layer, hereinafter referred to as non-uniformity). If the degree of non-uniformity is less than 0.1 μm, it is difficult to obtain a monochromatic and rich iris color, whereas if it exceeds 1 μm, the color development is also undesirably pale. The non-uniform thickness cycle (meaning the distance between adjacent thick portions or the distance between adjacent thin portions) corresponds to the density of the iris pattern and is usually preferably about 0.5 to 20 cm, but is limited to this range. Not something. The period may be constant or not constant. The non-uniform pattern is usually a stripe pattern, but is not limited thereto.

As the resin for forming the transparent resin layer (4b) having a non-uniform thickness, any of various resins such as a thermoplastic resin, a thermosetting resin, an electron beam curable resin, and an ultraviolet curable resin can be used. For example, an alkali resin, a styrene resin, an acryl-styrene copolymer, a vinyl chloride resin,
Vinyl acetate resin, vinyl chloride-vinyl acetate copolymer,
Polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, alkyd resin, amino alkyd resin, rosin-modified maleic resin, etc. Alternatively, a mixture is preferably used.

The transparent resin layer (4b) having a non-uniform thickness is formed by applying an organic solvent solution or an aqueous solution of the resin to a non-uniform thickness by a normal coating method such as a gravure coating method or a spray coating method. And drying (in the case of a thermosetting resin, an electron beam curable resin, an ultraviolet curable resin, etc., curing).

In the present invention, the thickness of the transparent resin overcoat layer (5) is usually 0.1.
It is selected from the range of 01 to 5 µm, more preferably the range of 0.02 to 3 µm. If the thickness of the transparent resin overcoat layer is less than 0.01 μm, the resistance to each of the above-mentioned treatments is not sufficient, which is not preferable. On the other hand, if it exceeds 5 μm, it is unfavorable because it becomes rigid as a whole in applications such as gold and silver threads and lacks in weaving properties and texture.

As a resin for forming the transparent resin overcoat layer (5), a thermoplastic resin, a thermosetting resin, an electron beam curable resin,
Any of various resins such as an ultraviolet curable resin can be used, for example, an acrylic resin, a styrene resin, an acryl-styrene copolymer, a vinyl chloride resin, a vinyl acetate resin, a vinyl chloride-vinyl acetate copolymer, Polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, alkyd resin, amino alkyd resin, rosin-modified maleic resin, etc. Alternatively, a mixture is preferably used. In particular, a curable resin is preferably used.

The transparent resin overcoat layer (5) is formed by applying an organic solvent solution, an aqueous solution, or the like of the resin to a uniform thickness by a normal coating method such as a gravure coating method or a spray coating method, and drying (thermal curing). (In the case of a hydrophilic resin, an electron beam curable resin, an ultraviolet curable resin, etc.).

The transparent resin undercoat layer (2), the transparent resin layer (4b) having a non-uniform thickness, and the transparent resin overcoat layer (5) are made of a dye and / or a pigment unless the transparency is impaired. It may be colored as appropriate.

In the present invention, the two laminates may be laminated by using an adhesive with two plastic films (1) facing inside or the other side facing inside to form a two-ply structure. When the plastic film (1) is formed in a two-ply configuration with the opposite side inside, a gold and silver thread that can withstand georgette processing as well as scouring processing can be obtained.

As the adhesive, an adhesive of a urethane resin type, an epoxy resin type, a polyester resin type, an acrylic resin type, a synthetic rubber type or the like is appropriately used.

The iris-colored laminate of the present invention is used for applications such as packaging materials, labels, sequins, posters, buttons, pendants, and other various decorative materials, and is particularly suitably used for gold and silver yarns.

An iris-colored gold-silver thread is obtained by slitting the iris-colored laminate to an appropriate width, for example, a width of 0.15 to 2 mm.

 Next, the present invention will be described with reference to examples.

Example 1 One side of a 12 μm thick polyethylene terephthalate film was composed of 100 parts of thermosetting acrylic resin (parts by weight, the same applies hereinafter), 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol. A transparent resin coating is applied with a gravure coater and dried, and cured at 160 ° C for 20 seconds to form a 0.2 μm-thick transparent resin undercoat layer, on which Si and SiO ₂ are pressed. The formed pellet is evaporated by a resistance heating method as an evaporation source to form a silicon oxide protective layer having a uniform thickness of 40 nm, and a pellet obtained by press-forming 99% pure zinc sulfide (ZnS) powder is further formed thereon. Evaporation is performed by a resistance heating method as an evaporation source to form a zinc sulfide thin film layer having a uniform thickness of 40 nm, on which thermosetting acrylic resin 50 parts, polyisocyanate 5 parts, toluene 50 parts , 30 parts of xylene, n-
A transparent resin coating consisting of 20 parts of butyl alcohol is applied and dried with a gravure coater and cured under the conditions of 160 ° C. × 20 seconds, and the transparent resin layer having an uneven thickness (average thickness 0.5 μm,
(Maximum thickness 0.8μm, minimum thickness 0.2μm, thickness non-uniformity, 0.6μm, non-uniform period 20mm, parallel stripe pattern)
Was formed to obtain a laminate having a beautiful iris color.

The obtained laminate was micro-slit into 120 cuts (0.252 mm width) to obtain iris-colored gold and silver threads.

Example 2 Example 1 was the same as Example 1 except that a bismuth oxide thin film layer having a uniform thickness was formed using bismuth oxide (Bi ₂ O ₃ ) as an evaporation source instead of the zinc sulfide thin film layer. To obtain an iris-colored laminate and an iris-colored gold-silver thread.

Example 3 In Example 1, an antimony oxide thin film layer having a uniform thickness was formed by using antimony oxide (Sb ₂ O ₃ ) as an evaporation source instead of the zinc sulfide thin film layer.
In the same manner as in the above, an iris-colored laminate and an iris-colored gold-silver thread were obtained.

Example 4 In Example 1, a rainbow was formed in the same manner as in Example 1 except that a silicon protective layer having a uniform thickness of 30 nm was formed using silicon as an evaporation source instead of the silicon oxide protective layer. A colored laminate and an iris-colored gold-silver thread were obtained.

Example 5 In Example 1, an aluminum oxide (Al ₂ O ₃ ) was used as an evaporation source in place of the silicon oxide protective layer, and the thickness was 50 n.
An iris laminate and an iris gold-silver thread were obtained in the same manner as in Example 1 except that an aluminum oxide protective layer having a uniform thickness of m was formed.

Example 6 Two sheets of the laminate obtained in Example 1 were bonded together with a polyethylene terephthalate film inside through a 2 μm-thick urethane resin-based adhesive layer to obtain a two-ply iris-colored laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Example 7 A resin undercoat layer and a silicon oxide protective layer were sequentially formed on one side of a polyethylene terephthalate film having a thickness of 12 μm in the same manner as in Example 1, and then 100 parts of a thermosetting acrylic resin, 5 parts of a polyisocyanate, Toluene 50
Parts, 30 parts of xylene, and 20 parts of n-butyl alcohol were coated with a gravure coater and dried at 160 ° C.
Transparent resin layer having an uneven thickness by curing under conditions of × 20 seconds (average thickness 0.6 μm, maximum thickness 1 μm, minimum thickness 0.2
μm, thickness non-uniformity 0.8 μm, non-uniform period 30 mm, parallel striped pattern), and then press-formed a pellet of 99% pure zinc sulfide powder as a vapor source by resistance heating method. A zinc sulfide thin film layer having a uniform thickness of 40 nm is formed, and further comprises 50 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol. A transparent resin coating is applied with a gravure coater and dried, cured under the conditions of 160 ° C x 20 seconds to form a transparent resin overcoat layer with a uniform thickness of 0.2 μm and a beautiful iris layer I got a body.

The obtained laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 1 A transparent resin coating composed of 100 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene and 20 parts of n-butyl alcohol was coated on one side of a 12 μm-thick polyethylene terephthalate film with a gravure coater. Apply and dry at 160 ° C x 20 seconds and cure to a thickness of 0.2
forming a transparent resin undercoat layer having a non-uniform thickness of μm,
Further, zinc sulfide was vacuum-deposited to form a zinc sulfide layer having a uniform thickness of 40 nm, and then 50 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, and 50 parts of toluene.
Parts, 30 parts of xylene, and 20 parts of n-butyl alcohol were coated with a gravure coater and dried at 160 ° C.
The coating was cured under the conditions of × 20 seconds to form a transparent resin overcoat layer having a uniform thickness of 0.2 μm to obtain an iris laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 2 A zinc sulfide layer having a uniform thickness of 40 nm was formed on one side of a polyethylene terephthalate film having a thickness of 12 μm by vacuum deposition of zinc sulfide in the same manner as in Example 1, and a thermosetting acrylic was further formed thereon. A transparent resin coating consisting of 50 parts of resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol is applied by a gravure coater and dried, and cured at 160 ° C. for 20 seconds to be nonuniform. Transparent resin layer (average thickness 0.5 μm, maximum thickness)
0.8 μm, minimum thickness 0.2 μm, thickness non-uniformity 0.6 μm,
An iris-colored laminate was obtained by forming a non-uniform period of 20 mm and a parallel stripe pattern.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 3 A transparent resin coating composed of 100 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol was coated on one surface of a 12 μm-thick polyethylene terephthalate film by a gravure coater. Apply and dry at 160 ° C x 20 seconds and cure to a thickness of 0.2
A transparent resin undercoat layer having a uniform thickness of μm is formed, and zinc sulfide is vacuum-deposited thereon to form a zinc sulfide layer having a uniform thickness of 40 nm, and 50 parts of a thermosetting acrylic resin is further formed thereon. , Polyisocyanate 5 parts, toluene 50
Parts, 30 parts of xylene, and 20 parts of n-butyl alcohol were coated with a gravure coater and dried at 160 ° C.
Transparent resin layer having an uneven thickness by curing under conditions of × 20 seconds (average thickness 0.6 μm, maximum thickness 1 μm, minimum thickness 0.2
μm, thickness non-uniformity 0.8 μm, non-uniform period 20 mm, parallel stripe pattern) to obtain an iris-colored laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

The iris color of each of the obtained iris-colored gold-silver yarns was visually observed and evaluated according to the following criteria.

◎: The iris color is rich and powerful, the gloss is outstanding, and the iris pattern is extremely clear.

 …: The iris is rich in color and has excellent gloss.

 Δ: The iris color is monotonous and the gloss is poor.

 ×: The color is very pale.

The following treatments were performed for each iris-colored gold and silver thread, and the change in iris color was visually observed, and evaluated according to the following criteria. In this evaluation, since the color change before and after the processing is observed, even if the iris color before the processing is inferior, if the iris color does not change before and after the processing, the evaluation is A
It turns out that.

 A: No change in iris color.

 B: Abnormalities such as contamination occur in the iris color.

 C: The color disappeared.

Treatment method (1) Bleaching Treatment solution: sodium hypochlorite 4 g, water 1 Treatment temperature: 70 ° C Treatment time: 90 minutes (2) Nylon dyeing treatment solution: glacial acetic acid 1 g, amilazine D 0.5 g acid dye (Diac
id Brill. Blue BR) 5% owf, water 1 Treatment temperature: 95 ° C Treatment time: 90 minutes (3) Rayon dyeing treatment solution: 15 g of anhydrous sodium sulfate, 1 g of monogen (170T), 5% of direct dye (Direct Deep Black EX) owf, water 1 Treatment temperature: 95 ° C Treatment time: 90 minutes (4) Wool dyeing treatment solution 1: 3.3 g of anhydrous sodium sulfate, 1 g of acetic acid, 0.5 g of aborane SC,
Acid dye (Kayalon Milling Black TLB) 5% owf, water 1 Treatment temperature: 95 ° C Treatment time: 90 minutes Treatment solution 2: Acidmin super 2g, water 1 Treatment temperature: 40 ° C Treatment time: 30 minutes (5) Reaction dyeing Treatment solution: 40 g of anhydrous sodium sulfate, 15 g of sodium carbonate, 5% owf of reactive dye (Cibacron Brill. Red BE), water 1 Treatment temperature: 60 ° C Treatment time: 90 minutes (6) Silk scouring Treatment solution: Marcel soap 3 g, Hydrosal Fight 0.8
g, sodium silicate 3.9 g, water 1 Treatment temperature: 95 ° C Treatment time: 9 hours The results are shown in Table 1.

[Effect of the Invention] In the iris color laminate, the iris layer has a configuration in which an iris compound thin film layer and a resin layer having an uneven thickness are laminated, and the iris layer is a transparent resin undercoat layer and a transparent inorganic protective layer. The iris color is rich in color and powerful, and the luster is remarkably excellent.It has an extremely clear iris pattern, and it has a resistance to scouring, bleaching, and other processing of fabrics. Post-dyeing of nylon, wool, etc. is possible.

[Brief description of the drawings]

FIG. 1 is a schematic partial sectional view showing one embodiment of the iris-colored laminate of the present invention, and FIG. 2 is a schematic partial sectional view showing another embodiment. (Signs in the drawings) (1): transparent plastic film (2): transparent resin undercoat layer (3): transparent inorganic protective layer (4): iris layer (4a): iris compound thin film layer (4b): non-uniform Transparent resin layer having thickness (5): transparent resin overcoat layer

Claims (2)

(57) [Claims] An iris compound thin film layer selected from the group consisting of zinc sulfide, bismuth oxide, and antimony oxide is provided on one side of a transparent plastic film, and the difference between thick and thin layers is 0.1 to 1 μm. A laminate comprising a transparent iris layer formed by laminating a transparent resin layer having a non-uniform thickness, wherein the iris layer is formed on the plastic film and has a thickness of 0.2 to 3 μm. An iris-colored laminate characterized by being provided via a layer laminated in the order of a resin undercoat layer and a transparent inorganic protective layer having a thickness of 25 to 50 nm. 2. An iris gold-silver thread, which is a slit thread of the iris laminate according to claim 1.